Fountain-pen filler



jan. 29,1929.

F. B. CHAMBERLIN FOUNTAIN PEN FILLER Filed March 6, 1928 i dalllllllllllllllll. llllllvlill vll Il l l. n, ffii a uerste@ Il?.Chamberlin attoznu Patented Jan. 2,9, 1929,.

UNITED sTA'lll'ssl PATENT eFH-ca.v

FIRA-NK BCHAMBERLIN, 0F COLUMBUS, OHIO.

'roUN'rmNnN FILLnn:

Application led Iarclr 6, 1928. Serial No. 259,548. l'

intervals to refill the pen from time to time.-

This is due to the fact that the ink'reservoir gor magazine is onlypartially filled with but.

a relatively small quantity of ink which soon -becomes exhausted, and itis-an object of the present'invention to provide a more effective formof filling mechanism in connection with a fountain pen, by means ofwhich the latter will be enabled to receive a much larger quantity ofthe `writing fluid so that the necessit of frequent'rellings will becorrespon ingly reduced.

For further understanding of the invention reference islto be had to thedescription and the accompanying drawings wherein:

Y Figure 1 1s a vertical sectlonal view taken through a fountain penconstructed 1n ac- .cordance with the present invention,

Figure 2 is an enlarged vertical sectional view taken through the upperor bulb end of the fountain pen,

Figure v3 is -a transverse sectionalA view taken throughthe line 3--3 ofFigure 2,

Figure 4 is a vertical sectional viewtaken.'

' .throughaslightly modified form of bulb,

`rel 1 to the pen -point-2. y j The uper end of the barrel which is re-'Figure `5 is a transverse sectionalview non the line 545101:' Figure 4.

Referring-more particularly to om any suitable materials commonlyemployed in connection with writinginstruments of this character.

The barrel of thepen is. provided with the Ausual pen point 2,

the usual feeder 3,-.wh1ch controls the ow of Link, or other writingfluid, .from the ink einstl which is laced reservoir or magazine 4provided in the barduced in 'ameter as compared with the body the*draw`A` Aings the numeral 1` des'gnatesthefbarrel of 'a" fountain penconstructed in accordance withn thepresent invention. Generally, theybarrelyis ofvstandard form construction and size and maybe formed fr ofthe barrel, is provided -with exterior threads 5 for the reception of aremovable bulb protecting cap 6. This cap is of tapered form to receivethe removable shell 7 when ,the pen is in use. It will be understoodthat 'the shell is adapted ,tobe applied to'protect .the pen point whenthe fountain pen is beln carried or is out of use as is customar ituatedin the upper end of the barrel 1s a plug 8 which closes the upper end ofthe reservoir 4;. Carried by the plug and extending axially throughoutthe length of the reservoir is a major air expelling tube 9. The upperend of this tube communicates with the interior of` a collapsible bulb10, 'which is formed from rubber'or other equivalent mal terial. Thelower end ofthe bulb is cemented or otherwise fastened to a bossprojecting from the upper portion of the plug 8. The lower end of thetube 9 terminates in the ink passageway 11 which is provided between thepen point 2 and the 'feeder 3. Also carried by the plug 8 is a short orminor tube ,12, which is formed from a collapsible material such as thematerial em loyed in the bulb 10. The lower end ofthe s ort tube 12terminates in vcommunication'with the upper ortion of the reservoir 4,lwhile the u per en of said tube `terminates adjacent to t e top of thebulb 10.

In operation, when itis desired'to refill the reservoir of the pen withink, the cap 6 is first removed so that the bulb 10 will be renderedaccessible. submerged' in a body 'of ink, andthe bulb 10 is The penpoint is then'k compressed so as to expel the airfrom the inn p teriorofsaidv bulb by way ofthe major tube -9 and the passageway 11. ThenA whenlthe bulb is released-the exterior air pressure on -the bodyof ink forces.the ink. upwardlyinto the reservoir 4 to an-`extent governed bytheexpulsion 'of theA air when the bulb,was first i collapsed. -This singleoperation, however,

onl partially fills the reservoir or magazine, an in order that furtheror a complete filling 0f the reservoir may be obtained, the bulb 12 is'again collapsed exhausting a still further quantity "of air from thereservoir or the bulb 10, permitting of an additional ink flow into saidreservoir. `'It will be observed that f'when the bulb is compressed thepressure vap'- plied by the operator also acts to'compress or close theshort tube 12 so that'the displaced air will be forced through the majortube 9 and not through the minor tube 12. It is or'this 4reason that thetube 12 is formed from a com-l pressible material, and in thisconnection I may state that experience has demonstrated that thecollapsible tube 12 is very effective in preventing return flow of airto the barrel v during the iilling operation. Beside being extremelysimple in construction the tube l2 functions very positively and issuperior to check valves and other similar devices which then ready foruse.

the subjoined claims.

In the modified form of the invention disclosed in Figures 4l and 5 thebulb 10Et is .termed to include an exterior groove 13, in which the tube12 is positioned. By, locattlie tube 19, to the 'exterior of the bulblOa i e operator is enabled to apply pressure at most effective pointsto secure the desired eperation. This can be accomplished skill- 'ullyin the modified form of the invention since the tube 12al is exposed toview and may kbe readily compressed by the operator. I havedisclosedwhatI consider to be the prei'erred forms. in the present invention butnevertheless it will be understood that changes or variations' may bemade in the construction of the pen from that herein A{peciically shownand described, Without departin from the scope and operation of theinvention as the latter has been defined in What is claimed is:

In a fountain pen, a barrel including an internal ink reservoir, a tubeextending 'through said reservoir from one end thereof to the other, abulb of compressible material secured to one end oi said barrel, tbeinterior said bulb being in communication with one and of said tube, aseconda ltube in communication with said reservoir and with the upperend of the interior of said bulb, said operable lto permit of the flowof. air from said reservoir into said bulb, said tube being `Formed froma colla sible material to prevent the flow of air rom the bulb intonthereservoir when said bulb is being comunresseda and an air exhaust tubeleading from the interior of said bulb to the exterior of the pen.,

3. In a fountain pen, a barrel including an internal ink reservoir, anda closure at one end of said barrel, a collapsible bulb carried by saidclosure, a tube extending axially through said reservoir, one end ofsaid tube c end of said bulb, the said collapsible tube be-l ingadapt-able upon compression of said bulb to close in order to preventreturn dow ot air from said bulb into said reservoir, the expansion ofsaid bulb permitting of the non' of air from said reservoir into saidbulbby vvay oi" the collapsible tube,

y 4. In a fountain pen, a barrel including an internal ink reservoir,and a closure at one end of said barrella a collapsible bulb carried bysaid closure, a tube extending axially through said revervoir, one endof said tube being in communication with 'the interior ont said bulb andthe other end of said tub-e leading to the exterior of the en, wherebyupon the collapse of the bulb t e displaced air is discharged from thepen by Way oi said tube,

and a compressible tube communicating with said reservoir and With the'pper and inner end of said bulb, the said collapsible tube beingadaptable upon compression of said bulb to close in order to preventreturn flow oi air from said bulb into said reservoir, the expansion ofsaid bulb peri'nitting ot the den @if air from said reservoir into saidbulb by Way of the collapsible tube.

5. In a fountain pen, a barrel'including an ink reservoir, a closure forthe upper end oit said reservoir a. bulb of; collapsible materialcarried by said Iclosure, an air exhaust tube carried rb f said closureand-communicating at one en with the interior of said bulb, the

` other end of said tube leading to the exterior of said pen, said bulbbeing provided with a vertically extending groove? and a tube oftcollapsible material positioned onf said groove, said collapsible tubecommunieatin? are' at one end with the upper position of sait;

reservoir and at its opposite end with upper and inner portion of said'bulb In testimony i I

